@luvrocking
My 1200 also used to hum off and on then I figured out it seemed to only hum when a curling iron was in use. I discovered that it was indeed the curling iron and now I know it never hums unless the curling iron is on. Now that I know what it is it is no big deal. It never seemed to degrade the sound much if any at all .though. If not a curling iron it could be some other odd thing hooked up in your electrical system somewhere. I hope this may be the case and you can track down the cause.
My 1200 also used to hum off and on then I figured out it seemed to only hum when a curling iron was in use. I discovered that it was indeed the curling iron and now I know it never hums unless the curling iron is on. Now that I know what it is it is no big deal. It never seemed to degrade the sound much if any at all .though. If not a curling iron it could be some other odd thing hooked up in your electrical system somewhere. I hope this may be the case and you can track down the cause.